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dem82 [27]
4 years ago
12

2. - 2x + xy + 5x – 4xy + x

Mathematics
1 answer:
andrezito [222]4 years ago
7 0
-3xy+4x is the answer

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A rectangle has an area 105 in2 and a length of 7 inches.  What is the length?​
QveST [7]

Answer:

Width is 15in

Step-by-step explanation:

Area=lengthxwidth

105=7w

divide by 7

7 0
3 years ago
I need help with math.............
telo118 [61]
Greetings!

Solve using the properties of equality:
2(x+2)=4x+1-2x
Distribute the Parenthesis.
2x+4=4x+1-2x
Combine like terms.
2x+4=2x+1
There are no possible solutions.

Hope this helps.
-Benjamin

4 0
3 years ago
What is a partition is geometry?
s344n2d4d5 [400]

Answer:

Partition means to separate or to divide. A line segment can be partitioned into smaller segments which are then compared as ratios.

Step-by-step explanation:

5 0
4 years ago
Find its inverse and check your answer. (b) Find the domain and the range of f and
ElenaW [278]

We have the function:

f(x) = 3x / (x + 7)

(a)

We rename the function as: f(x) = y

Then:

y = 3x / (x + 7)

Taking the inverse:

1/y = (x + 7) / 3x

1/y = x/3x + 7/3x

1/y = 1/3 + 7/3x

Solving for x:

1/y - 1/3 = 7/3x

1/x = 3/7y - 1/7 = (3 - y) / 7y

Taking the inverse:

x = 7y / (3 - y)

Then, the inverse function of f is:

f ⁻¹(x) = 7x / (3 - x)

(b)

We know that the division by 0 is undefined in real numbers. From the function f, we have a division by 0 if x = -7, so the domain should be:

Dom_f = {x| x ≠ -7}

For the range, we know that x = -7 is a vertical asymptote of the function f, so this means that the graph never passes across x = -7, but it tends to it on infinity. Then, the range of f is:

Ran_f = All the real numbers

For f ⁻¹(x), we see that for x = 3 there is a division by 0, so this is an asymptote of the function. Then, the domain of f ⁻¹ is:

Dom_f ⁻¹ = {x| x ≠ 3}

Again, as there is an asymptote, the range is:

Ran_f ⁻¹ = All the real numbers

7 0
1 year ago
A teacher decides to purchase a new car and considers two options. Option one is the new Zoomba for $60,000 with an expected dep
Lady bird [3.3K]

The teacher chose option 2, the Starfish and it was valued at $35,200 after two months.

Step-by-step explanation:

Step 1; The Zoomba is priced at $60,000 and has an expected depreciation of 2% per month. So the annual depreciation is 12 months * 2% per month = 24% per year. The teacher plans to keep either car for two years do total depreciation is 2 years * 24% depreciation per year = 48 % in two years.

Value of car after two years = Buying price - Depreciation amount

= $60,000 - 48% of $60,000 = $60,000 - 0.48*$60,000 = $31,200

The car will be valued at $31,200 after two years. To determine how much value it has retained we divide the value in two years to the current value i.e $31,200 divided by $60,000 which equals 0.52 (52% of initial price)

Step 2; The Starfish is priced at $40,00 and will depreciate $200 every month. For a year it will depreciate 12 months * $200 per month = $2,400 a year. So for a total of two years a depreciaition of $4,800.

Value of car after two years = Buying price - Depreciation amount

= $40,000 - $4,800 = $35,200

The car will be valued at $35,200 after two years. To see the retained value we divide the depreciated value by the current value i.e. $35,200 divided by $40,000 which equals 0.88 (88% of the initial price)

Step 3; Of the two options, the Starfish retains more of its value over two years. So the teacher chose the Starfish over the Zoomba.

7 0
4 years ago
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